What shortcut to open Node Wrangler menu in 2.8?
Shortcut for the Node Wrangler's Quick access menu in 2.8 is Shift+W.
Shortcut for Node Wrangler's Quick access menu in 2.79 is Ctrl+Spacebar.

You can also press T to open Properties shelf on the right in 2.8 or N to open Toolshelf on the left in 2.79 and prior and open Node Wrangler addon's tab; there you will find all the tools it provides with shortcuts shown if you hover over them as well as the Quick Access shortcut  written in the top.



I don't have any idea what Ctrl+Shift+Alt+wm.call_menu actually is; wm.call_menu is a command entered into RNA field in the user prefs shortcut dialog and has nothing to do with a shortcut itself, it's a way to tell Blender menu with some choices should appear. The source for the choices is then pointed out in the Name field.